第27题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. The class thought the demonstration was too complex. B. Too many students showed up. C. The professor didn’t show up. D. The professor cancelled it. 参考答案:D 答案解析:[听力原文] W: Why didn’t you have your geology class today M: Only three out of a class of twenty
第28题: [单项选择]常见的零件图多为()。 A. 平面投影图 B. 立体投影图 C. 轴侧投影图 D. 立体图 参考答案:A